CN218178885U - Micro-channel membrane reactor for hydrogen catalytic combustion - Google Patents
Micro-channel membrane reactor for hydrogen catalytic combustion Download PDFInfo
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- CN218178885U CN218178885U CN202222079529.XU CN202222079529U CN218178885U CN 218178885 U CN218178885 U CN 218178885U CN 202222079529 U CN202222079529 U CN 202222079529U CN 218178885 U CN218178885 U CN 218178885U
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Abstract
The utility model relates to a micro-channel membrane reactor for hydrogen catalytic combustion, which comprises a reactor body, a reactor upper cover, a reactor lower cover and a sealing structure; the reactor body is arranged in a closed space formed by buckling an upper cover and a lower cover of the reactor, and a sealing structure is arranged in the closed space at the periphery of the reactor body; the reactor body consists of a shell, a hydrogen separation membrane and a microchannel reaction chamber. The utility model is a micro-channel membrane reactor with 10-1000 channels and channel size from micron to nanometer; the application range is large, and the device can be suitable for application occasions of different scales by changing the channel size, the channel number and the reactor number; the hydrogen is catalytically combusted in the microchannel reaction chamber, and the hydrogen and other gases are separated by the hydrogen separation membrane, so that only the hydrogen participates in the reaction in the catalytic combustion process, and reaction products can be rapidly discharged, thereby playing a good protection role on the activity of the catalyst.
Description
Technical Field
The utility model relates to a hydrogen can catalysis technical field especially relates to a microchannel membrane reactor for hydrogen catalytic combustion.
Background
The microchannel reactor refers to a microreactor whose internal structure is mainly composed of micron-sized (usually 10 to 300 μm) channels. The microchannel reactor has the advantages of small channel size, strong experiment controllability, high safety coefficient, easiness in amplifying the experiment level and the like, and is widely concerned.
The membrane reactor is a new technology combining a membrane process and a reaction process. Has a series of advantages: the reaction and separation are combined into a single unit process, so that the cost of the separation and other processes is reduced; for reversible reaction, thermodynamic equilibrium limitation is broken through, and a product is removed through a membrane diffusion process, so that the conversion rate reaches 100%; the parameters of the reaction process are adjusted, the reaction conditions are alleviated, the selectivity and the yield of the target product are improved, and the side reaction is reduced. Membrane reactors have also received much attention because they can achieve both separation and reaction processes.
Experiments and application of traditional fossil energy such as natural gas on a micro-reactor and a membrane reactor are very wide, the membrane reactor can be used for solving the problems of natural gas impurity removal, tail gas recovery and the like, and the micro-channel reactor can help the experiments to be more controllable. However, the by-product of natural gas contains greenhouse gases such as carbon dioxide, which seriously pollutes the atmospheric environment and human health.
Hydrogen has gradually entered the public as a good clean energy source, and in order to explore the relevant technologies and applications of hydrogen combustion, reactors with various excellent performances need to be developed. Firstly, hydrogen belongs to flammable and explosive gas, and the basis for ensuring experimental safety and application safety is to utilize hydrogen energy. Secondly, pure hydrogen gas is combusted to generate water vapor, and the water vapor can deactivate a catalyst to cause experiment failure; meanwhile, the combustion temperature of hydrogen is 1200 ℃, the combustion temperature of nitrogen is 1000 ℃, and in the process of hydrogen combustion, nitrogen in the air can be combusted to generate a large amount of nitrogen oxides and carbon dioxide, so that the environment is seriously harmed. In addition, the first and second substrates are, industrial non-pure hydrogen may be doped with sulfur-containing and carbon-containing gases, not only are large amounts of greenhouse gases released during catalytic combustion, but the catalyst also deactivates. Therefore, it is generally desirable to employ a catalyst-loaded membrane microchannel reactor.
Disclosure of Invention
The utility model provides a micro-channel membrane reactor for hydrogen catalytic combustion, which is a micro-channel membrane reactor with 10-1000 channels and channel size from micron to nanometer; the application range is wide, and the device can be suitable for application occasions of different scales by changing the size of the channels, the number of the channels and the number of the reactors; the hydrogen is catalyzed and combusted in the microchannel reaction chamber, the hydrogen and other gases are separated through the hydrogen separation membrane, only the hydrogen participates in the reaction in the catalytic combustion process, reaction products can be rapidly discharged, and the catalyst activity can be well protected.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a micro-channel membrane reactor for hydrogen catalytic combustion comprises a reactor body, a reactor upper cover, a reactor lower cover and a sealing structure; the reactor body is arranged in a closed space formed by buckling an upper cover and a lower cover of the reactor, and a sealing structure is arranged in the closed space at the periphery of the reactor body; the reactor body consists of a shell, a hydrogen separation membrane and a micro-channel reaction chamber; the hydrogen separation membrane divides the shell into an upper space and a lower space which are independent, one end of the top of the shell is provided with a hydrogen inlet, and the corresponding upper space of the shell is a hydrogen channel; the bottom of the shell at the same end is provided with an air/oxygen inlet, and the bottom of the lower space of the shell is an air/oxygen channel; the upper part of the lower space of the shell is provided with a plurality of channels, and each channel is loaded with a catalyst to form a micro-channel reaction chamber; the top of the microchannel reaction chamber is separated from the hydrogen channel by a hydrogen separation membrane, and the bottom of the microchannel reaction chamber is directly communicated with the air/oxygen channel; the other end of the top of the shell is provided with an impurity gas and water vapor outlet; the upper cover of the reactor corresponding to the hydrogen inlet is provided with a hydrogen inlet, and the lower cover of the reactor corresponding to the air/oxygen inlet is provided with an air/oxygen inlet; the reactor upper cover corresponding to the impurity gas and steam outlet is provided with an impurity gas and steam outlet.
The number of the microchannel reaction chambers is 10-1000, and the width of the microchannel reaction chambers is micron-sized or nano-sized.
The hydrogen separation membrane is a PdO membrane, a Pd-Cu membrane or a Pd-Au membrane.
A plurality of channels are arranged in parallel in the direction of hydrogen inlet-impurity gas and water vapor outlet, and the channel walls are made of a zirconium-based material.
The catalyst loaded in the microchannel reaction chamber consists of a catalyst carrier and catalyst particles; the catalyst carrier is nano porous alumina or porous silica; the diameter of the catalyst particles is 5 nm-500 nm.
The sealing structure is a graphene sealing layer.
The shell is made of high-temperature resistant stainless steel or zirconium materials.
The reactor upper cover and the reactor lower cover are both made of high-temperature resistant stainless steel.
Compared with the prior art, the beneficial effects of the utility model are that:
1) The microchannel membrane reactor combines the advantages of the membrane reactor and the microchannel reactor, is applied to hydrogen energy combustion, and has the characteristics of safety, controllability, easiness in large-scale amplification, improvement on reaction efficiency by membrane separation and impurity removal, long service life of a catalyst and the like;
2) The microchannel membrane reactor with 10-1000 channels and channel size from micron to nanometer has wide application range, and can be suitable for application occasions with different scales such as pilot plant test, actual production and the like by changing the channel size, the channel number and the reactor number;
3) The combustion temperature of hydrogen is reduced by adopting a catalytic hydrogen combustion principle, so that a large amount of harmful byproducts generated by the combustion of gases such as nitrogen in the air are avoided, and the hydrogen is more pure in combustion;
4) The adopted catalyst particles and catalyst carriers have wide temperature and pressure ranges, lower cost and higher economy;
5) The hydrogen is catalytically combusted in the microchannel reaction chamber at the high temperature of between room temperature and 900 ℃, and the hydrogen and other gases are separated by the hydrogen separation membrane, so that only the hydrogen participates in the reaction in the catalytic combustion process, reaction products can be rapidly discharged, and the catalyst activity can be well protected.
Drawings
FIG. 1 is an exploded view of a microchannel membrane reactor according to the present invention.
Fig. 2 is a schematic perspective view of the reactor body according to the present invention.
Figure 3 is a schematic cross-sectional view of the reactor body of the present invention.
In the figure: 1. the reactor comprises a reactor upper cover 1-1, a hydrogen gas inlet 1-2, an impurity gas and steam gas outlet 2, a sealing structure 3, a reactor body 3-1, a shell 3-2, a hydrogen separation membrane 3-3, a micro-channel reaction chamber 3-4, a hydrogen gas inlet 3-5, an impurity gas and steam outlet 3-6, an air/oxygen inlet 4, a reactor lower cover 4-1, an air/oxygen gas inlet 4
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings:
as shown in fig. 1-3, the microchannel membrane reactor for hydrogen catalytic combustion according to the present invention comprises a reactor body 3, a reactor upper cover 1, a reactor lower cover 4 and a sealing structure 2; the reactor body 3 is arranged in a closed space formed by buckling the reactor upper cover 1 and the reactor lower cover 4, and a sealing structure 2 is arranged in the closed space at the periphery of the reactor body 3; the reactor body 3 consists of a shell 3-1, a hydrogen separation membrane 3-2 and a micro-channel reaction chamber 3-3; the hydrogen separation membrane 3-2 divides the shell 3-1 into an upper independent space and a lower independent space, one end of the top of the shell 3-1 is provided with a hydrogen inlet 3-4, and the corresponding upper space of the shell 3-1 is a hydrogen channel; the bottom of the shell 3-1 at the same end is provided with an air/oxygen inlet 3-6, and the bottom of the lower space of the shell 3-1 is an air/oxygen channel; a plurality of channels are arranged at the upper part of the lower space of the shell 3-1, and each channel is loaded with a catalyst to form a micro-channel reaction chamber 3-3; the top of the micro-channel reaction chamber 3-3 is separated from the hydrogen channel by a hydrogen separation membrane 3-2, and the bottom of the micro-channel reaction chamber 3-3 is directly communicated with the air/oxygen channel; the other end of the top of the shell 3-1 is provided with an impurity gas and water vapor outlet 3-5; the upper cover 3-1 of the reactor corresponding to the hydrogen inlet 3-4 is provided with a hydrogen inlet 1-1, and the lower cover 4 of the reactor corresponding to the air/oxygen inlet 3-6 is provided with an air/oxygen inlet 4-1; the upper cover 1 of the reactor corresponding to the outlet 3-5 of the impurity gas and the vapor is provided with an outlet 1-2 of the impurity gas and the vapor.
The number of the microchannel reaction chambers 3-3 is 10-1000, and the width of the microchannel reaction chambers 3-3 is micron-scale or nano-scale.
The hydrogen separation membrane 3-2 is a PdO membrane, a Pd-Cu membrane or a Pd-Au membrane.
A plurality of channels are arranged in parallel along the direction of the hydrogen gas inlet 3-4-impurity gas and water vapor outlet 3-5, and the channel walls are made of a zirconium-based material.
The catalyst loaded in the microchannel reaction chamber 3-3 consists of a catalyst carrier and catalyst particles; the catalyst carrier is nano porous alumina or porous silica; the diameter of the catalyst particles is 5 nm-500 nm.
The sealing structure 2 is a graphene sealing layer.
The shell 3-1 is made of high temperature resistant stainless steel or zirconium series materials.
The reactor upper cover 1 and the reactor lower cover 4 are both made of high-temperature resistant stainless steel.
A microchannel membrane reactor for hydrogen catalytic combustion is a microchannel membrane reactor that has 10 ~ 1000 passageways and passageway size for micron to nanometer, utilizes hydrogen to catalyze, and low temperature is to middle and high temperature burning is exothermic.
Arrange the reactor body in the reactor lower cover, after the seal structure is filled to the reactor body periphery, close the back with reactor upper cover and reactor lower cover again, obtain hydrogen catalytic combustion's microchannel membrane reactor. The reactor upper cover and the reactor lower cover are used for forming a closed space, and the sealing structure is used for sealing the reactor body and preventing gas leakage during reaction.
A theory of operation that is used for microchannel membrane reactor of hydrogen catalytic combustion as follows:
hydrogen is taken as fuel, oxygen or air is taken as combustion improver, and impurity gases (such as sulfur-containing gas, carbon-containing gas and the like) in the hydrogen are separated and removed through a hydrogen separation membrane; the purified hydrogen enters the microchannel reaction chamber downwards through the hydrogen separation membrane, and the hydrogen catalytic combustion process is realized through the adsorption, reaction and desorption of the active sites of the catalyst. The reaction product, namely the water vapor, is quickly discharged due to the pressure drop action of the impurity gas and the water vapor outlet, so that the influence of the water vapor on the activity of the catalyst is reduced.
The reaction process is as follows: hydrogen as fuel enters a hydrogen inlet at the top of the reactor body from a hydrogen inlet of the upper cover of the reactor, then enters a hydrogen channel at the upper part of the reactor body from the hydrogen inlet, and the purified hydrogen enters the microchannel reaction chamber downwards under the separation action of the hydrogen separation membrane and is adsorbed, reacted and desorbed by the active site of the catalyst in the microchannel reaction chamber, thereby realizing the hydrogen catalytic combustion process. The separated impurity gas and the water vapor are discharged together through an impurity gas outlet and a water vapor outlet at the top of the reactor body and through an impurity gas and water vapor outlet at the upper cover of the reactor. Air or oxygen enters an air/oxygen inlet at the bottom of the reactor body from an air/oxygen inlet of the lower cover of the reactor, then enters an air/oxygen channel at the lower part of the reactor body from the air/oxygen inlet, and then enters each microchannel reaction chamber to perform catalytic combustion reaction with hydrogen.
The impurity gas and the water vapor are quickly discharged, the influence of the impurity gas and the water vapor on the performance of the catalyst is reduced, the service life of the catalyst is prolonged, and the harm of hydrogen combustion byproducts (such as nitrogen oxides and the like) to the environment is reduced.
In the micro-channel membrane reactor of the utility model, the catalyst loaded in the micro-channel reaction chamber consists of catalyst particles and a catalyst carrier; the catalyst particles are supported on a catalyst support or in the pores of a porous catalyst support. The expression for the catalyst particles is: am-Bn, A is a catalyst main body material, such as Zn or W; m is the proportion of the main material of the catalyst, and m is 0.1 to 0.9; b is catalyst additive material, such as one or more of Fe, cu, pd and Pt, n is the proportion of the catalyst additive material, and n is 0.1-0.9.
The above, only be the embodiment of the preferred of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, which are designed to be replaced or changed equally, all should be covered within the protection scope of the present invention.
Claims (8)
1. A micro-channel membrane reactor for hydrogen catalytic combustion is characterized by comprising a reactor body, a reactor upper cover, a reactor lower cover and a sealing structure; the reactor body is arranged in a closed space formed by buckling an upper cover and a lower cover of the reactor, and a sealing structure is arranged in the closed space at the periphery of the reactor body; the reactor body consists of a shell, a hydrogen separation membrane and a microchannel reaction chamber; the hydrogen separation membrane divides the shell into an upper space and a lower space which are independent, one end of the top of the shell is provided with a hydrogen inlet, and the corresponding upper space of the shell is a hydrogen channel; the bottom of the shell at the same end is provided with an air/oxygen inlet, and the bottom of the lower space of the shell is an air/oxygen channel; the upper part of the lower space of the shell is provided with a plurality of channels, and each channel is loaded with a catalyst to form a micro-channel reaction chamber; the top of the microchannel reaction chamber is separated from the hydrogen channel by a hydrogen separation membrane, and the bottom of the microchannel reaction chamber is directly communicated with the air/oxygen channel; the other end of the top of the shell is provided with an impurity gas and water vapor outlet; the upper cover of the reactor corresponding to the hydrogen inlet is provided with a hydrogen inlet, and the lower cover of the reactor corresponding to the air/oxygen inlet is provided with an air/oxygen inlet; the upper cover of the reactor corresponding to the outlet of the impurity gas and the vapor is provided with an outlet of the impurity gas and the vapor.
2. The microchannel membrane reactor of claim 1, wherein the number of the microchannel reaction chambers is 10 to 1000, and the width of the microchannel reaction chambers is micro-scale or nano-scale.
3. The microchannel membrane reactor for hydrogen catalytic combustion according to claim 1, wherein the hydrogen separation membrane is a PdO membrane, a Pd-Cu membrane or a Pd-Au membrane.
4. The microchannel membrane reactor for hydrogen catalytic combustion as claimed in claim 1 or 3, wherein a plurality of channels are arranged in parallel in a direction of hydrogen inlet-impurity gas and water vapor outlet, and the channel walls are made of a zirconium-based material.
5. The microchannel membrane reactor for catalytic combustion of hydrogen of claim 1, wherein the catalyst supported by the microchannel reaction chamber consists of a catalyst support and catalyst particles; the catalyst carrier is nano porous alumina or porous silica; the diameter of the catalyst particles is 5 nm-500 nm.
6. The microchannel membrane reactor for hydrogen catalytic combustion according to claim 1, wherein the sealing structure is a graphene sealing layer.
7. The microchannel membrane reactor of claim 1, wherein the housing is made of a high temperature resistant stainless steel or a zirconium-based material.
8. The microchannel membrane reactor of claim 1, wherein the reactor upper cover and the reactor lower cover are made of high temperature resistant stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222079529.XU CN218178885U (en) | 2022-08-09 | 2022-08-09 | Micro-channel membrane reactor for hydrogen catalytic combustion |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222079529.XU CN218178885U (en) | 2022-08-09 | 2022-08-09 | Micro-channel membrane reactor for hydrogen catalytic combustion |
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| Publication Number | Publication Date |
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| CN218178885U true CN218178885U (en) | 2022-12-30 |
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| CN202222079529.XU Active CN218178885U (en) | 2022-08-09 | 2022-08-09 | Micro-channel membrane reactor for hydrogen catalytic combustion |
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Address after: No. 110-17, 158 Chengsi Road, Lili Town, Wujiang District, Suzhou City, Jiangsu Province, 215000 Patentee after: Suzhou Longtai Hydrogen Energy Technology Co.,Ltd. Patentee after: Monash science and Technology Research Institute of Suzhou Industrial Park Address before: 215000 Auxiliary Building 1-019, North Building, Comprehensive Building, No. 1699, Zuchongzhi South Road, Yushan Town, Kunshan City, Suzhou, Jiangsu Province Patentee before: Kunshan Arctic Hydrogen I Energy Technology Co.,Ltd. Patentee before: Monash science and Technology Research Institute of Suzhou Industrial Park |
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